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PLUNGER I l r flew... j au 41%@ Y A 4f J. H. BRYANT Filed Feb. 2v. 192s'Patented Nov. 10, 1925.

UNITED sra'rss isaiasi JOHN H. BRYANT. 0F CHICAGO. TLLTNOTS.

PLUNGER.

Application filed February 27., 1925.

To all whom t may concern:

Be it known that I, JOI-IN H. lnYAN'r, a citizen of the United States,residing at 2621 N. Sawyer Ave., Chicago, in the county of Cook andState of Illinois, have invented new and useful Improvements inPlungers, of which the following is a specification.

This invention 'relates to new and useful improvements in plungers andmore particularly to that type which are generally used in washingmachines. The main object of my invention is the provision of a noveltype of plunger so constructed as to create a maximum amount of suctionwithin the plunger' when the same is being withdrawn from the cleansingfluid in which the clothes are contained so as to cause a thoroughagitation of the fluid.

Another object of my invention is the novel manner of mounting thepiston or plunger within the cylinder to create an initial movement tosaid plunger or piston prior to the movement of the cylinder supportingthe piston or plunger so as to create a maximum amount of suctiontherein to thoroughly agitate the washing fluid.

With the above and other objects in view, my invention consists in thenovel features of construction and the combination and arrangement ofparts to be hereinafter more fully described, pointed out in the claimsand shown in the accompanying drawings, in which:

Fig. 1 is a side elevation of the plunger constructed in accordance withmy invention.

Fig. 2 is a vertical sectional view with the piston in its uppermostposition.

Fig. 3 is a similar view with the piston in its lowermost position.

Fig. 4L is a vertical sectional view through the entire device.

Fig. 5 is a transverse section on the line 5 5 of Fig. 2.

Referring now more particularly to the drawings the numeral 1 indicatesthe cylinder of my improved plunger having its upper end provided withinternal screw threads 2, engaging with these screw threads is thethreaded flange 3 of the dome shaped cover 4. This cover 4 is providedat its top portion with an upstanding sleeve 5 forming a bearing throughwhich the rod 6 reciprocates. The end of the rod which projects into thecylinder 1 is provided with a re duced portion 7 adapted to be fittedinto Serial No. 12J/i6.

the bearing 8 of the piston 9 and riveted as illustrated in Fig. thuspositively connecting the piston and rod.

Mounted within the plunger is a substantially conical shaped spring 10the largest convolution of which is seated in an annular groove 11formed in the side wall of the cylinder 1 at the inner end of thethreads 2. Thus when the cover 4l is placed in position, the edgethereof which is threaded into the cylinder will abut the largestconvolution of the spring 10 and retain the spring securely in position.

The spring 10 surrounds the rod 6 and has positioned in its upper end awasher 12 which is retained against movement relative to the spring androd 6 by means of a transverse pin 13 carried by the rod and normallyengaging the upper face of the washer. The washer 12 has a reduced portion lelextending into the smallest convolutions of the spring 1() inorder to retain the spring in its proper position relative to the rod. i

The piston 9 is tightly fitted within thc cylinder 1 for reciprocatingmovement and. carries an extension ring 15 and is provided in its lowerface with an arcuate cavity 16. In the operation of my improved plungerit will be apparent that on its downward movement, the cylinder 1 willpass through the washing fluid which is indicated at 17 and strike theclothes contained therein and further downward movement of the cylinder1 is at this period prevented through contact with the clothes so thatthe continual movement of the rod 6 will overcome the tension of thespring 10, permitting the piston 9 to move to the outer end of thecylinder as shown in Fig. 3, this movement reversingthe position of thespring 10 and placing the same under considerable tension. From theabove it will be apparent that upon the upper stroke of the rod 6 thepiston 9 moves upwardly on its initial movement while the cylinder 1remains stationary until the spring 10 again assumes its uprightposition as shown in Fig. 4. This initial movement relative to thecylinder 1 creates a suction within the lower end of the cylinder, dueto the cavity 16 in the lower face of the piston as is clearlyillustrated in Fig. et so as to thoroughly agitate the washing fluidupon the various strokes of the plunger.

It will be apparent from the foregoing that li have provided a simpleand inexpensive plunger ttor washing; nachines, the action ot' whichcreates a ina-iniiinn amount ot agitaticif` in the washing fluid so aste s iiiipzir a `greater agitation te the clothes through the fluid torcleansing the clothesx. lvlhile i have set forth the fact that thedevice is particularly adapted for use in connection with washingmachines7 it will loe ieiidilv rv f arent that the saine may he handoperi. en if so desired.

have shown and described the 'oi-ui oi my invention7 it will be variouschanges in thc details i and in the proportions: may siircessfullycarrying' iny )ractce without sacrih'cing; feriti or departing` from ledclaims.

ntion to the fact that up 1rd stroke ot the piston created in the lowerend ot' which causes the aand to be sucked throul n the n thedo'iinviard movement will he noted that the air water 1s orced throughthe clothes in the opposite direction`r thus providing` a thc-roughcleansingof the same.

Having thus described my invention, what .l claim ie:

l. plunger including a cylinder having an annular groove thereinadjacent one end, a piston nioiinted tor movement in the cylinder. a rodhaving` connection With the piston,

a conical shap id spring Inelnher having one end ,seated within thegroove and encircling the rod;` a stop pin carried hy the rod and awasher between the stop Iein and the other end el the spiiiw'.

i iiihe'fiem includinga a cylinder having one end iiiteri'ially threadedand further provided with ai annular groove at the inner end el thethreaded portion, a cover meinher having; threaded engagement with thecylinder, :i piston in the cylinder, :i piston rod in vahlc through thecover and having connection with the piston7 a spring ineinherencircling the rod and havingv one `end enlarged within the groovebeneath the in- :i il e rever and" means carried by he rod 'n hearingeng;agementr with the r end i l the spring'.

fi plunger including a cylinder having` =rnai rf cw threads at one endand furi i with an annular groove at the e the tlireaded portion, aconical shaped coil springv having its largest convoluton seated in thegroeve, a cover threaded into the cyl' 'ider for engi y jenient with thelargest conv hition to retain the sprine i position relative tothecylinder, a piston n'iovable in the cylinder, a rod connected to thepiston and extending through the smallest con solutions of the springand a Washer on the rod hearing` against the latter convolutions.

ln testin'lony whereof I alix my signature.

JOHN H. BRYANT.

